We have a curved glass shower door on the bath and the seal that came with it has long since rotted. I have tried so many replacements which claim to work with curved doors, but they just don't - they are not flexible enough (even when heated). I am now using a kind of waterproof rubbery sealant tape, but it doesn't last more than a few days before it starts peeling off again. I don't want to superglue it on as it'll never come off when it starts to deteriorate. Any ideas?